Stressed-out students scrambling to polish off research papers confront an ethical dilemma of Shakespearean proportions: To CtrlC or not to CtrlC? Too often, they hit the unethical key, copying work they claim as their own. Turnitin.com, a Web site service that spots student plagiarism, is an equally high-tech attempt to stymie the cut-and-paste laziness that can lead to F's and expulsion from high school or college. The anti-plagiarism device is but one route educators take in grappling with new technology that is wired with opportunities and ripe for abuse.

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